The Knight - Season 1 Episode 6 A 70 year old woman

Four women are found dead in a caravan. Research shows that they have contracted CO poisoning. The women appear to be part of an Eastern European group of women who have to clean toilets along the roadside restaurants of the company Lunchline for a hunger wage. With the help of the sister of one of the murdered women, the public prosecutor tracks down the driver of the group of traffickers. There appears to be a whole tangle of businesses and intermediaries attached to human trafficking. In the end Lunchline will be taken to court and compensation will be paid to the victims.